XP User Interface: How can I lock a screen in the Luna UI

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Question:

Now that I have Windows XP for a while, I got used to the 'Luna' user interface but how can I lock the screen? I used to press Control+Alt+Delete and then chose 'Lock Screen'. Now this hot key brings up the task manager.

Answer:

Use the Windows Key (right of your space key) and press the L key simulatenously.
Other useful shortcuts are: